Lewis & Short

caesărĭes, ēi, f. [kindr. with Sanscr. kēsa, coma, caesaries, Bopp, Gloss. p. 85, a],

  1. I. a dark (acc. to Rom. taste, beautiful) head of hair, the hair (mostly poet.; only sing.).
      1. 1. Of men (so most freq.), Plaut. Mil. 1, 2, 64: ipsa decoram Caesariem nato genitrix afflarat, Verg. A. 1, 590: nitida, id. G. 4, 337: flava, *Juv. 13, 165: pectes caesariem, *Hor. C. 1, 15, 14: umeros tegens, Ov. M. 13, 914: terrifica, id. ib. 1, 180: horrida fieri, id. ib. 10, 139: horrifica, Luc. 2, 372 et saep.
        In prose: promissa, Liv. 28, 35, 6; Vulg. Num. 6, 5.
      2. 2. Of women, Cat. 66, 8; Verg. G. 4, 337 Forbig. ad loc.; Ov. Am. 3, 1, 32; id. M. 4, 492.
    1. * B. Transf., the hair of dogs, Grat. Cyn. 272.
  2. II. Barbae, the hair of the beard (very rare), Ov M. 15, 656.